Fig. 2From: Spin- and Valley-Dependent Electronic Structure in Silicene Under Periodic PotentialsEnergy spectrum versus k y for several different values of potential U. (a1–a4) U=0; (b1–b4) U=40.66 meV; (c1–c4) U=100.63 meV; (d1–d4) U=135.0 meV. The values of parameters are h=8.0 meV, Δ z =7.8 meV, and k x =0Back to article page